<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="./node_modules/vue/dist/vue.js"></script>
</head>
<body>
    <div  id="app">
        {{content}}
    </div>
    
</body>
<script>
    var app = new Vue(
        {
            el:"#app",
            data:{
                content:'niubi'
            }
        }
    )
    setTimeout(function(){
        app.$data.content="buniubi"
    },2000)
</script>
</html>